// 打印类属性、方法定义
/* eslint-disable */
const Print = function (dom, options) {
	if (!(this instanceof Print)) return new Print(dom, options);

	this.options = this.extend(
		{
			noPrint: ".no-print",
		},
		options
	);

	if (typeof dom === "string") {
		try {
			this.dom = document.querySelector(dom);
		} catch {
			var createDom = document.createElement("div");
			createDom.innerHTML = dom;
			this.dom = createDom;
		}
	} else {
		this.isDOM(dom);
		this.dom = this.isDOM(dom) ? dom : dom.$el;
	}

	this.init();
};

Print.prototype = {
	init: function () {
		var content = this.getStyle() + this.getHtml();
		this.writeIframe(content);
	},
	extend: function (obj, obj2) {
		for (var k in obj2) {
			obj[k] = obj2[k];
		}
		return obj;
	},

	getStyle: function () {
		var str = "",
			styles = document.querySelectorAll("style,link");
		for (var i = 0; i < styles.length; i++) {
			str += styles[i].outerHTML;
		}
		str +=
			"<style>" +
			(this.options.noPrint ? this.options.noPrint : ".no-print") +
			"{display:none;}</style>";
		str += "<style>html,body{background-color:#fff;}</style>";
		return str;
	},

	getHtml: function () {
		var inputs = document.querySelectorAll("input");
		var textareas = document.querySelectorAll("textarea");
		var selects = document.querySelectorAll("select");

		for (var k = 0; k < inputs.length; k++) {
			if (inputs[k].type == "checkbox" || inputs[k].type == "radio") {
				if (inputs[k].checked == true) {
					inputs[k].setAttribute("checked", "checked");
				} else {
					inputs[k].removeAttribute("checked");
				}
			} else if (inputs[k].type == "text") {
				inputs[k].setAttribute("value", inputs[k].value);
			} else {
				inputs[k].setAttribute("value", inputs[k].value);
			}
		}

		for (var k2 = 0; k2 < textareas.length; k2++) {
			if (textareas[k2].type == "textarea") {
				textareas[k2].innerHTML = textareas[k2].value;
			}
		}

		for (var k3 = 0; k3 < selects.length; k3++) {
			if (selects[k3].type == "select-one") {
				var child = selects[k3].children;
				for (var i in child) {
					if (child[i].tagName == "OPTION") {
						if (child[i].selected == true) {
							child[i].setAttribute("selected", "selected");
						} else {
							child[i].removeAttribute("selected");
						}
					}
				}
			}
		}

		return this.dom.outerHTML;
	},

	writeIframe: function (content) {
		var w,
			doc,
			iframe = document.createElement("iframe"),
			f = document.body.appendChild(iframe);
		iframe.id = "myIframe";
		//iframe.style = "position:absolute;width:0;height:0;top:-10px;left:-10px;";
		iframe.setAttribute(
			"style",
			"position:absolute;width:0;height:0;top:-10px;left:-10px;"
		);
		w = f.contentWindow || f.contentDocument;
		doc = f.contentDocument || f.contentWindow.document;
		doc.open();
		doc.write(content);
		doc.close();
		var _this = this;
		iframe.onload = function () {
			_this.toPrint(w);
			setTimeout(function () {
				document.body.removeChild(iframe);
			}, 100);
		};
	},

	toPrint: function (frameWindow) {
		try {
			setTimeout(function () {
				frameWindow.focus();
				try {
					if (
						!frameWindow.document.execCommand("print", false, null)
					) {
						frameWindow.print();
					}
				} catch (e) {
					frameWindow.print();
				}
				frameWindow.close();
			}, 10);
		} catch (err) {
			console.log("err", err);
		}
	},
	isDOM:
		typeof HTMLElement === "object"
			? function (obj) {
					return obj instanceof HTMLElement;
			  }
			: function (obj) {
					return (
						obj &&
						typeof obj === "object" &&
						obj.nodeType === 1 &&
						typeof obj.nodeName === "string"
					);
			  },
};

export default Print;
